relative humidity

noun

: the ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature

Examples of relative humidity in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Following the fires, Hochul issued a burn ban on Sunday for Long Island, New York City, and parts of the Hudson Valley due to the ongoing fire risk from gusty winds and lower relative humidity. John Bacon, USA TODAY, 9 Mar. 2025 Dozens of counties across Central and South Florida were on alert for fire weather conditions on Thursday, the National Weather Service (NWS) warning that a combination of strong winds and low relative humidity could contribute to extreme fire behavior in the Sunshine State. Tommy Tuberville, Newsweek, 6 Mar. 2025 Ignitions were caused by very low relative humidity, coupled with drying fuels resulting from the lack of significant rain. Alexandra Koch, Fox News, 3 Mar. 2025 The weather service said the relative humidity is expected to drop to around 43%. Robert A. Cronkleton, Kansas City Star, 27 Jan. 2025 See All Example Sentences for relative humidity

Word History

First Known Use

1819, in the meaning defined above

Time Traveler
The first known use of relative humidity was in 1819

Browse Nearby Words

Cite this Entry

“Relative humidity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/relative%20humidity. Accessed 13 Mar. 2025.

Kids Definition

relative humidity

noun
: the amount of water vapor actually present in the air compared to the greatest amount possible at the same temperature

Medical Definition

relative humidity

noun
: the ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature compare absolute humidity

More from Merriam-Webster on relative humidity

Last Updated: - Updated example sentences
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